CN-224209475-U - Center frame of crankshaft lathe

CN224209475UCN 224209475 UCN224209475 UCN 224209475UCN-224209475-U

Abstract

The utility model relates to a crankshaft lathe center frame which comprises a support frame body driven by a translation driving mechanism to move along a guide rail, wherein two telescopic support assemblies are arranged on the support frame, each telescopic support assembly comprises a support arm, a cushion block arranged at the front end of the support arm and used for supporting the lower part of a main journal of a crankshaft, and a telescopic driving mechanism for controlling the support arm to radially stretch along the main journal on the support frame, the two support arms are symmetrically arranged about the central line of the main journal, and the telescopic axes of the two support arms are coplanar and perpendicular to the extending direction of the guide rail. The support frame has the advantages that the movement of the support frame and the extension and retraction of the support arm are controlled through the servo motor, so that the operation of remotely controlling the support frame is realized, the operability of machining is improved, the labor intensity of workers can be greatly reduced, and the skill training of the workers is easier to realize.

Inventors

MA ZHIHONG
ZHAO FU
KONG QINGYUAN
ZHUANG LINGYUN
XU KAI
HUANG JIAWEN
YANG CHENG
SUN XIANPING

Assignees

上海船用曲轴有限公司

Dates

Publication Date: 20260508
Application Date: 20250530

Claims (5)

1. A center frame of a crankshaft lathe is characterized by comprising a support frame body which is driven by a translation driving mechanism and can move along a guide rail, wherein two telescopic support assemblies are arranged on the support frame, each telescopic support assembly comprises a support arm, a cushion block arranged at the front end of the support arm and used for supporting the lower part of a main journal of the crankshaft, and a telescopic driving mechanism for controlling the support arm to radially stretch along the main journal of the support frame, the two support arms are symmetrically arranged about the central line of the main journal, the telescopic axes of the two support arms are coplanar, and the plane is perpendicular to the extending direction of the guide rail.
2. The crankshaft lathe center frame of claim 1, wherein the telescopic axis of the support arm forms an angle of 45 degrees with the horizontal plane.
3. The crankshaft lathe center frame of claim 1, wherein the telescopic driving mechanism comprises a motor, a reduction gearbox, a transmission mechanism, a screw rod and a screw rod nut, the motor output shaft is vertically arranged, the reduction gearbox is connected with the motor output shaft, the transmission mechanism is connected between the reduction gearbox output shaft and the screw rod, and the screw rod nut is sleeved on the screw rod and is connected with the supporting arm.
4. A center frame of a crankshaft lathe according to claim 3 is characterized in that the transmission mechanism comprises a first bevel gear, a rotating shaft and a second bevel gear, wherein the first bevel gear, the rotating shaft and the second bevel gear are fixed on an output shaft of a reduction gearbox, the rotating shaft is arranged on a support frame in a horizontal rotating mode, one end of the rotating shaft is sleeved with a third bevel gear meshed with the first bevel gear, the other end of the rotating shaft is sleeved with a fourth bevel gear meshed with the second bevel gear, and the second bevel gear is coaxially fixed on the lead screw.
5. The crankshaft lathe saddle of claim 4, wherein the screw is a ball screw and the screw nut is a ball screw nut.

Description

Center frame of crankshaft lathe Technical Field The utility model relates to the technical field of crankshaft production and processing, in particular to a crankshaft lathe center frame. Background The marine crankshaft is supported and positioned by a plurality of center frames on the crankshaft lathe, and the coaxiality of the whole crankshaft can be directly influenced by the relative positions of the support columns of the center frames, so that the crankshaft is accurately positioned before the semi-combined marine crankshaft is machined by the crankshaft lathe. When the crankshaft is positioned, an operator clamps the gear throwing table in the gear throwing table to rotate along with the crankshaft, then operates the rotating crankshaft, and after the rotation is finished, several operators observe and record the readings of the gear throwing table near the crankshaft so as to measure the gear throwing distance between every two adjacent crank arms and observe the change of the crank distance of the crankshaft in one rotation period, thereby judging the coaxiality of the whole crankshaft. And (3) adjusting the center frame support column in a mode of manually rotating the center frame support column handle to the crankshaft with coaxiality errors, so as to correct the errors. Obviously, the mode of adjusting the support frame has the defects of high dangerous degree and high working strength, and consumes a great deal of manpower and time. Therefore, the working mode of the manual adjustment support frame seriously affects the machining quality and the machining period of the crankshaft, and is very unfavorable for field machining. For this production situation, there is an urgent need for a device capable of automatically adjusting the support post of the support frame to replace the current support frame. Disclosure of utility model The embodiment of the utility model aims at overcoming the defects of the prior art structure and provides a crankshaft lathe center frame which aims at solving the defects in the prior art. In order to achieve the above purpose, the crankshaft lathe center frame provided by the embodiment of the utility model is realized by the following technical scheme: A center frame of a crankshaft lathe is characterized by comprising a support frame body which is driven by a translation driving mechanism and can move along a guide rail, wherein two telescopic support assemblies are arranged on the support frame, each telescopic support assembly comprises a support arm, a cushion block arranged at the front end of the support arm and used for supporting the lower part of a main journal of the crankshaft, and a telescopic driving mechanism for controlling the support arm to radially stretch along the main journal of the support frame, the two support arms are symmetrically arranged about the central line of the main journal, the telescopic axes of the two support arms are coplanar, and the plane is perpendicular to the extending direction of the guide rail. The telescopic axis of the supporting arm forms an included angle of 45 degrees with the horizontal plane. The telescopic driving mechanism comprises a motor, a reduction gearbox, a transmission mechanism, a screw rod and a screw rod nut, wherein an output shaft of the motor is vertically arranged, the reduction gearbox is connected with the output shaft of the motor, the transmission mechanism is connected between the output shaft of the reduction gearbox and the screw rod, and the screw rod nut is sleeved on the screw rod and is connected with the supporting arm. The transmission mechanism comprises a first bevel gear, a rotating shaft and a second bevel gear, wherein the first bevel gear, the rotating shaft and the second bevel gear are fixed on an output shaft of the reduction gearbox, the rotating shaft is arranged on the support frame in a horizontal rotating mode, one end of the rotating shaft is sleeved with a third bevel gear meshed with the first bevel gear, the other end of the rotating shaft is sleeved with a fourth bevel gear meshed with the second bevel gear, and the second bevel gear is coaxially fixed on the lead screw. The screw is a ball screw, and the screw nut is a ball screw nut Compared with the prior art, the utility model has the beneficial effects that: The utility model provides a crankshaft lathe center frame, which controls the movement of a supporting frame and the extension and contraction of the supporting arm through a servo motor, thereby realizing the remote control of the operation of the supporting frame, improving the operability of processing, greatly reducing the labor intensity of workers and realizing the skill training of the workers. Drawings The above features and advantages of the present utility model will become more apparent and readily appreciated from the following description of exemplary embodiments thereof, taken in conjunction with the accompanying drawings. FIG. 1 is a sche